Internal flue for chimneys or smoke-flues.



No. 648,726. Patented May l, i900.

' T. P. CORDREY.

INTERNAL FLUE FOB CHIMNEYS 0R SMOKE FLUES.l (Application'led J an. 13,1900.)

(No Model.)

UNrTED STATES PATENT UFFICE."

THOMAS l). lCORDl-EY, OF FOR'l" tVAYNE, INDIANA.

INTERNAL FLUE FQR CHIMNEYS O R SlVlOKE-FLUES.

SPECIFICATION forming part Of Letters Patent No. 648,726, dated May 1,1900.

Application filed January 18| 1900. Serial No. 1,320. (No model.)

.To all 107mm. z5 may concern.:

Be it known that I, THOMAS P. CORDREY, v

a citizen of the United States, residingin the cit'y of Fort Vayne, inthe county of Allen and State of Indiana, have invented a' new anduseful Internal Fine for Chimneys or Smoke-Flims, of which the followingisa specification.

My invention relates to improvementsvi'n chimneys or smoke-nes designedto canry off the-products of combustion; and the objects of myimprovement arc,'frst, to provide an internal vflue for a chimney thatshall thoroughly protect its walls from vthe action of deleteriousfumesand gases; second, to provide an internal flue that maybe more easilycleansed; third, to provide an internal fille that can be readily placedwithin an existing chimney.

Other objects and advantages will hereinafter appear from ythedescription.; and the invention consists in the construct-ion and novelcombination of parts hereinafter described, pointed ont in the appendedclaims, and illustrated .in the accompanying drawings, in which- Figure1 is a plan view of the supportingframe. Fig. 2 is a sectional viewshowing the method of attaching the sections of the device. Fig. 3 is avertical section of device in placein an angle in a chimney. Fig. 4 isan enlarged detail showing the iiue connected to the angle-iron.

Similainumerals of reference refer to simi- 'lar parts throughout theseveral views.

It is well known that the mortar and cement used in building and liningbrick chimneys disintegrate from val'ious causes and especially from thedeleterious gases and fumes of combustion. This disintegration becomesso rapid where natural gas is used that within a year or two the chimneyisnsually stripped of its lining or cement coating, portions of themortar between the bricks have fallen out, and the chimney is leftthereby in a dangerous condition. Frequent Ires result therefrom ,anditis then especially unsafe to change to a light fuel, such as Wood. Ihave discovered a cheap and speedy process by which sheets of asbestosup to half an inch or more in thickness can be bent in form of arectangular or other angular ue, so that it will substantially maintainsuch i'orm, the forming being done Without tearing or injuriouslyaffecting the fibers of the sheet. I also have discovered that when auasbestos flue shall become coated by the products of combustion it canbe readily cleansed by passing through such ilue certain metallic fumesin connection with the products of combustion, the result being thatsuch coating is thereby entirely detached from the asbestos walls of theue without injuring the vsame and falls ldown without any manipulation.VThese processes of cleansing asbestos dues and of forming asbestos iluesin sec# tional lengths I reserve as the subjectanatterforotherapplications. I preferablycoatsuch asbestos fines on the outsidewith asphaltum or other waterproof coating` l2 to thoroughly protect it4from external dampness. Such coating is appliedby a brush or othersuitable means similar to the application of a' -coat of paint.

The ue is constructed as follows: Sheets of asbestos are 'made intosectional parts or joints 5 of the form and size desired and preferablythirty-six inches in length, 011e end of each section being adapted toenter the other end of the section to be placed over it, theoverlappings 6 being preferably about two inches in length, whichsections when joined are preferably further secured byriveting themtogether to further secure them in place 'to form a continuous ue. Oneend of such section maybe crimped similar to the crimping ofstovepipe-sections for the same pur'- pose. The first section or bottomof the iiue is provided with a frame 7, made of angleiron and conformingin size and shape'to the flue, as shown in Fig. 1. The horizontal partof the angle-iron does not-project beyond the thickness-of the wall ofthe iiue, and its vertical sides are attached to the bottom of the filleby rivets or in any other suitable manner, so as to be securelyattached. (See Figs. l and 4.) The asbestos sheets when shaped toconform to the size and form of the flue in cross-section have theirvertical edges 11 (see Fig. 1) riveted together. or otherwise secured,the lap being preferably two inches. This is a preferable method ofsecuring the sidesin place to preserve the form of the iiue;

Where anew chimney is constructed, niy

IOO

e p Marce ,formed section l() of the internal ilue adapted to fit suchangular space is formed, as shown inl Fig. 3, the vertically-placedfines having their tops and bottoms at right angles to the line of theiiue and 'the angling all being provided for by such special section l0,as vshown in said drawing. Where such lues are in an existing chimney,it is necessary to remove a portion of the brick of the chimney on onesideof the place Where such angling is made to put in suchspecialsections at that place and then 'replace the wall of the chimney.

My iiue is constructed, as before stated, entirely of asbestos sheets,preferably of one-half inch in thickness and preferably coated on theoutside, as before stated, with waterproof coating to exclude dampness.An existing chimney where the cement and mortar by reason ofdisintegration have become .loose and fallen down, leaving dangerouscracks and crevices in the chimney, is thoroughly Walls of the chimneyproper furnishes additional protection to said chimney, and the materialused permits the use of metallic fumes of a character to quickly cleanseits Walls of all deposits from the products of combustion. Itsconstruction permits the sections to be 10W- ered into an existingchimney singly, the sections being placed and securely attached as theyare lowered from the top. Such internal flues can be made'cheaply,easilysupported and secured in position, and where placed in a newchimney the cement lining may be dispensed with. My internal flue thusmade and placed is almost indestructible.

Y Flues constructed in sections or joints riveted or secured to eachother to form an entire flue are very old. I do not claim suchconstruction; but A What I do claim, and desire to secure'byLettersPatent, is

I. The combination with a chimney or smoke-dues of an internal fluecomposed of asbestos, shaped to conform'to the flue of said chimney orsmoke-dues, and placed therein so that a small air-space shall be formedaround it; and Waterproof coating to the outside of said internal ilue.`

2. As an article of manufacture, short ilues formed of asbestospreferablythirty-six inches in length and adapted to be secured to eachother to form a continuous flue and provided with a Waterproof coatingon their external surfaces.

3. An internal ilue formed of asbestos adapted to be placed inside `of'achimney or smoke-dues formed in sections adapted to be secured to eachother to form a continuous ue, and a metallic frame securely attached-to the lower end of the bottom section.

In witness-whereof I have hereunto set my hand, in the presence of twowitnesses, at the city of Fort Wayne,lndiana,this 11th day of January,1900.

THOMAS I. CORDREY.

Vitnesses:

R. E. THAIN, l-I. A. HARTMAN;

